package com.oop.jihe.Collection;
//迭代器遍历
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

public class Tes_Collection_ergodic1 {
    @SuppressWarnings({"all"})
    public static void main(String[] args) {
        Collection col = new ArrayList();

        col.add(new Book_a("三国演义", "罗贯中", 10.1));
        col.add(new Book_a("小李飞刀", "古龙", 5.1));
        col.add(new Book_a("红楼梦", "曹雪芹", 34.6));

        //System.out.println("col=" + col);
        //现在希望能够遍历 col集合
        //1.先得到col对应的迭代器
        Iterator iterator = col.iterator();
        //2.使用while循环遍历
//        while (iterable.hashCode()) {//判断是否还有数据
//            //返回下一个元素，类型是object
//            Object obj = iterator.next();
//            System.out.println("obj=" + obj);
        while (iterator.hasNext()) {//判断是否还有数据
            Object obj = iterator.next();
            System.out.println("obj=" + obj);
        }
        //3. 当退出while循环后，这时iterator迭代器，指向最后元素
        // itertor.next();//NoSuchElementException
        //4. 如果希望再次遍历，需要重置我们的迭代器
        iterator = col.iterator();
        while (iterator.hasNext()) {//判断是否还有数据
            Object obj = iterator.next();
            System.out.println("obj=" + obj);
        }
    }
}

class Book_a {
    private String name;
    private String author;
    private double price;

    public Book_a(String name, String author, double price) {
        this.name = name;
        this.author = author;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Book{" +
                "name='" + name + '\'' +
                ", author='" + author + '\'' +
                ", price=" + price +
                '}';
    }
}
